ISOCAM Interactive Analysis User's Manual Version 5.0 - ISO - ESA

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64 CHAPTER 9. THE DATA PRODUCTS AND CIA DATA STRUCTURES These files contain dark current exposure, detector flat image, optical flat image, dead pixel map and PSF libraries. A listing of the files is provided below and full details can be found in the ISOCAM Handbook, Chapter 3, and Section 2.3.5. The files are listed here by their official name, again datalist.txt will help you associate these names with the files on the CD-ROM (see Section 9.1). • Basic calibration files: File CSCGCROSS CHCGCONV CCG*DEAD CCG*DARK CCG*DFLT CCG*OFLT CCG*SPEC CSWCVF CLWCVF1 CLWCVF2 CCG*SLP CCG*PSF IFPG CWHEELS ORBIT Description CAM SW noise/cross talk decorrelation matrices house keeping interpolation values CAM * dead pixel map CAM * dark current exposure CAM * detector flat field library CAM * optical flat field library CAM * filter & CVF spectral data CAM SW CVF description CAM LW CVF1 description CAM LW CVF2 description CAM * CVF spectral line profile CAM * point spread function library focal plane geometry CAM wheels information ISO orbital parameters (∗ = SW or LW .) • Higher level calibration libraries: File CCGLWDMOD CCG*TRANS CCG*LINEAR CCG*FRAME CCG*GLITCH CCG*STRAY Description of contents CAM LW parameters for the time dependent dark corrections CAM * model transients CAM * linearity correction library CAM * detector astrometric calibration CAM * glitch model CAM * non-dark local light model (∗ = SW or LW .) 9.4 Relating Data Product Types to CIA Data Structures. In Section 9.3 we have described the data products, or files, on the CD-ROM and and how the data products relate to the data product types. Here we shall discuss how the data product types relate to the data structures employed by CIA. 9.4.1 What is a CIA Data Structure? The CIA Data Structures have been specially designed to manage ISOCAM data within a CIA session. There are several types of structures, each of which are used to hold a specific type of data product, or data from different stages of CIA processing.
9.4. RELATING DATA PRODUCT TYPES TO CIA DATA STRUCTURES. 65 The CIA data structures are quite complex structures, containing many data. These include images (FRAMEs, EXPOSUREs and MOSAICs) and CAM parameters (CVF position, RA and DEC of images, etc. . . ). Where possible the data are presented in fields of the structure in a user-friendly format – telemetry coded parameters have been converted to string information by CIA. With the exception of PDSs (see Section 9.4.4) these structures are not regular IDL structures. Unfortunately, due to IDL memory management restrictions these structures do not have a user-friendly user interface and may well be the most difficult hurdles for CIA novices. You can’t do something like 6 : CIA> help, cia_struct, /str However, they do offer great flexibility. They can handle data from the most ‘exotic’ of observations (observations with telemetry drop-outs etc. . . ) and allow the advanced CIA user the possibility to perform a more sophisticated calibration. Most users will only briefly encounter CIA data structures as a means to prepare, or slice, their data before placing the data in the more user-friendly PDS and proceeding with calibration. CIA data structures are accessed via IDL handles. However, CIA does provide routines that make their manipulation transparent, so for the most part you never need to dig deeply into the nature of these structures. A similar suite of such routines exists for each data structure. For example, you may use such routines as scd get to extract data from an SCD, sad get to extract data from an SAD and so on. Part III serves as a reference guide to these data structures and manipulation routines. It also intended to be a companion to the CIA Basic Guide and to help you should you have difficulty with understanding references to CIA data structures that appear here. We will broadly group the CIA structures into those containing observation data (see Section 9.4.2) and those that contain calibration data (see Section 9.4.3). For a more detailed look at these structures see Chapter 15. 9.4.2 Structures containing Observation Data These structures are used to contain actual images from an observation and data about an observation. Science CAM Data (SCD) – ERD/SPD Level The SCD structure has two flavours, one is used to hold data of ERD product type, the ERD SCD, and the other of SPD product type, the SPD SCD. The ERD SCD contains all the EOI and RESET FRAMEs from a single STATE and in addition parameters describing that STATE, e.g. coordinates, lens, filter, etc. . . . The SPD SCD differs primarily in that it holds IMAGEs which have been computed from the EOI and RESET FRAMEs. These IMAGEs are either directly taken from the CISP data product or computed by CIA from the FRAMEs in the ERD SCD. Set of Science CAM Data (SSCD) The SSCD is primarily designed to catalogue a set of SCDs (either ERD SCDs or SPD SCDs, but not both together) belonging to the same CONFIGURATION and variables which describe that CONFIGURATION. However, it may be used to catalogue any number of STATEs: from all the STATEs in a AOT down toasingleSTATE. 6 For an indirect way of treating a CIA structure as a regular IDL structure see Section 16.1.2.
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ISOCAM Interactive Analysis User’
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Michael Rupen (NRAO) Jaqui Sam Lone
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vi CONTENTS 8 Polarization observat
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viii CONTENTS 14.4.6 x3d as a calib
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x CONTENTS 19.3 A beam-switch obser
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xii CONTENTS B CIA command short-li
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xiv CONTENTS
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xvi LIST OF FIGURES 14.13The raster
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xviii LIST OF FIGURES
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xx LIST OF TABLES
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2 CHAPTER 1. ABOUT THE CIA USER’S
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4 CHAPTER 2. ABOUT CIA 2.2 System r
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6 CHAPTER 2. ABOUT CIA Figure 2.2:
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8 CHAPTER 2. ABOUT CIA In addition,
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10 CHAPTER 2. ABOUT CIA 2.3.4 Custo
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12 CHAPTER 2. ABOUT CIA LOG Log fil
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Page 41: Introduction The Quick Start Guide
Page 44 and 45: 24 CHAPTER 3. RASTER OBSERVATION (C
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Page 56 and 57: 36 CHAPTER 5. SOLAR SYSTEM OBJECT O
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Page 79: Introduction The purpose of Part II
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Page 94 and 95: 74 CHAPTER 11. INTRODUCTION TO CIA
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114 CHAPTER 14. IMAGE ANALYSIS AND
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Introduction The purpose of this pa
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Chapter 15 CIA data structure high-
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15.2. OBSERVATION DATA STRUCTURES 1
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15.3. CALIBRATION DATA STRUCTURE (C
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15.4. AUXILIARY CALIBRATION DATA 17
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15.4. AUXILIARY CALIBRATION DATA 17
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15.5. PREPARED DATA STRUCTURE (PDS)
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Chapter 16 Data structure manipulat
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16.1. CIA DATA STRUCTURE INTERFACE
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16.1. CIA DATA STRUCTURE INTERFACE
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16.2. AN EXAMPLE OF SAD MANIPULATIO
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16.4. MANIPULATING THE MASK 195 and
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16.5. CDS DATA EXTRACTION 197 16.5
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16.6. MANIPULATING CIA DATA STRUCTU
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Chapter 17 Importing ISO data produ
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17.2. IMPORTING FITS TO REGULAR IDL
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Chapter 18 Export of CIA data struc
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18.3. EXPORT FOR ARCHIVING 207 CIA>
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Part IV Advanced Use of CIA 209
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212
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214 CHAPTER 19. ADVANCED SLICING 19
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216 CHAPTER 19. ADVANCED SLICING Fi
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230 CHAPTER 19. ADVANCED SLICING
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232 CHAPTER 20. ADVANCED DATA CALIB
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274 CHAPTER 21. USING SLICE WITHIN
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294 CHAPTER 22. SECOND ORDER CORREC
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296 CHAPTER 22. SECOND ORDER CORREC
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298 CHAPTER 23. X CIA REFERENCE GUI
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306 APPENDIX A. GLOSSARY beam-switc
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308 APPENDIX A. GLOSSARY FITS (data
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310 APPENDIX A. GLOSSARY raster dat
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312 APPENDIX A. GLOSSARY
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314 APPENDIX B. CIA COMMAND SHORT-L
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320 APPENDIX C. THE ISO CD-ROM C.2.
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322 APPENDIX C. THE ISO CD-ROM Vari
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324 APPENDIX D. GUIDELINES FOR WRIT
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326 APPENDIX D. GUIDELINES FOR WRIT
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328 APPENDIX E. ISOCAM ASTROMETRY:
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338 APPENDIX F. WHAT IS NEW IN CIA
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344 APPENDIX G. WARNING MESSAGES IN
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346 APPENDIX H. PATCHED ASTROLIB AN
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348 APPENDIX I. UPGRADING OLD CIA S
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350 APPENDIX I. UPGRADING OLD CIA S
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352 APPENDIX J. REPORTING PROBLEMS
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354 APPENDIX K. TECHNICAL REPORTS S
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356 BIBLIOGRAPHY Okumura K., 1998,
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